Tube length: 2000 mm Outer tube diameter: 58 mm Inner tube diameter: 47 mm Glass thickness: 1.6 mm Thermal expansion: 33X10-60•C Absorpivity: ≥95% Coating: AL-NA-L Inner Tank: SUS304-2Bwith 0.8 mm thickness Stainless Outer Tank: Steel with 0.6 mm thickness Stainless Frame: Steel with 1.5 mm thickness Insulation: 55 mm of high density polyurethane foam